docs: def dew_point(self, db):
          """Get the dew point (C), which is constant throughout the day (except at saturation).
  
          args:
              db: The maximum dry bulb temperature over the day.
          """
          if self._hum_type == 'Dewpoint':
              return self._hum_value
          elif self._hum_type == 'Wetbulb':
              return dew_point_from_db_wb(
                  db, self._hum_value, self._barometric_pressure)
          elif self._hum_type == 'HumidityRatio':
              return dew_point_from_db_hr(
                  db, self._hum_value, self._barometric_pressure)
          elif self._hum_type == 'Enthalpy':
              return dew_point_from_db_enth(
                  db, self._hum_value / 1000,  self._barometric_pressure)